Been doing pretty good. My Master has been better than my Ultra. I just like the more viable options in the Ultra. My master team is pretty much Metagross Tyranitar and Raikou. Only trouble I have is against Groudon. Other than that I do well. I have about 10-15 mons I like in Ultra. I find it more diverse and fun.
PvP Win/Loss Rate
How are you all doing? I wish there was an in-game tracker for overall win/loss statistics.
I'm sitting around a 75-80% win rate with just over 90 wins, not counting matches where someone has frozen or one of us has had to back out due to desyncing.
Answers
I've ran a total of 20-30 battles against locals and lost only once because of a badly timed shield. For 2 times fighting with my overseas community members, they easily outmaneuver me and i lose.
If you do not know, my team is Zapdos, Heatran/Metagross and Giratina. I could replace one of the last 2 with a Darkrai when the time comes. I simply seldomly lose to locals using that lineup because they just use the 2 shields on the first 2 charged moves and got ran over by Giratina or Zapdos usually.
Weavile in ultra league can be a problem. An example, this site's new guide assumes someone will buy a second move for Giratina-A. Well, seems Ancient Power would be needed bc 2490 Foul Play Weavile railroaded both a Ghost Giratina AND a Metagross. Some ways like a dice game, not sure investing a lot of dust/candy/TMs is wise unless you and your list really active with PvP.
Impossible to say for sure. Most of my matches have been in great league, where I think I have about 75% winrate because most locals still don't remember all movesets or even fully grasp type effectiveness.
I don't even have the silver medal yet for either masters or ultra because people here don't play them much, but I'd guess they are both around 50% winrate, masters probably a bit below.